Sundaland

The Sundaland was declared as a World Biosphere Reserve by the United Nations. This region is famous for its rich terrestrial and marine ecosystem. Sundaland is one of the biologically richest hotspots in India which comprises 25,000 species of vascular plants, of which 15,000 are found only in this region.

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#Unit 13. Methods in Biology

Hematoxylin binds to basic amino acids (lysine and arginine).

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#Unit 13. Methods in Biology

Eosin binds to acidic molecules (DNA and side chains of aspartate and glutamate).

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#Unit 13. Methods in Biology

Darkfield microscopy is used for very thin spirochetes, such as Treponema pallidum, the causative agent of syphilis.

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#Unit 13. Methods in Biology

The electrocardiogram (ECG or EKG) is a measures the electrical activity of the heart.

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#Unit 13. Methods in Biology

P wave represents depolarization of the atria.

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#Unit 13. Methods in Biology

Atrial repolarization is not seen on a normal ECG because it is “buried” in the QRS complex.